http请求返回并解析json数据
/* 注意get和post请求的发送区别 * 1、创建HttpGet(或HttpPost)对象，将要请求的URL通过构造方法传入HttpGet(或HttpPost)对象中； 2、使用DefaultHttpClient类的execute方法发送HTTP GET或HTTP POST 请求，并返回HttpResponse对象； 3、通过HttpResponse接口的getEntity方法返回响应信息。 * */public class TestHttpActivity extends Activity { private Button btn_get; private Button btn_post; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btn_get=(Button)findViewById(R.id.btn_get); btn_post=(Button)findViewById(R.id.btn_post); btn_get.setOnClickListener(listener); btn_post.setOnClickListener(listener); } private OnClickListener listener=new OnClickListener() {@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.btn_post:Log.i("TestHttpActivity", "ok"); DefaultHttpClient client = new DefaultHttpClient(); /**NameValuePair是传送给服务器的请求参数 param.get("name") **/ List<NameValuePair> list = new ArrayList<NameValuePair>(); NameValuePair pair1 = new BasicNameValuePair("name", "name0001"); NameValuePair pair2 = new BasicNameValuePair("age", "age0001"); list.add(pair1); list.add(pair2); UrlEncodedFormEntity entity=null;try {/**设置编码 **/entity = new UrlEncodedFormEntity(list,"UTF-8");} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();} /**新建一个post请求**/ HttpPost post = new HttpPost("http://aaron-pc.wsd.com/Test/testHttp"); post.setEntity(entity); HttpResponse response=null; String strResult="";try {/**客服端向服务器发送请求**/response = client.execute(post);} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} /**请求发送成功，并得到响应**/ if(response.getStatusLine().getStatusCode()==200){ try { /**读取服务器返回过来的json字符串数据**/ strResult = EntityUtils.toString(response.getEntity()); } catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} JSONObject jsonObject = null;try {/**把json字符串转换成json对象**/jsonObject = getJSON(strResult);} catch (JSONException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} String names=""; try { /** * jsonObject.getString("code") 取出code * 比如这里返回的json 字符串为 [code:0,msg:"ok",data:[list:{"name":1},{"name":2}]] * **/ /**得到data这个key**/ String data=jsonObject.getString("data"); /**把data下的数据转换成json对象**/ JSONObject jDat = new JSONObject(data); /**判断data对象下的list是否存在**/ if(jDat.get("list")!=null){ /**把list转换成jsonArray对象**/ JSONArray jarr = jDat.getJSONArray("list"); /**循环list对象**/ for (int i = 0; i < jarr.length(); i++) { /** **/ JSONObject jsono = (JSONObject) jarr.get(i); /**取出list下的name的值 **/ names=names+jsono.getString("name"); } }Toast.makeText(TestHttpActivity.this, "code:"+jsonObject.getString("code")+"name:"+names, Toast.LENGTH_SHORT).show();} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();} } else Toast.makeText(TestHttpActivity.this, "POST提交失败", Toast.LENGTH_SHORT).show(); break;case R.id.btn_get: DefaultHttpClient client1 = new DefaultHttpClient(); /**NameValuePair是传送给服务器的请求参数 param.get("name") **/ UrlEncodedFormEntity entity1=null; /**新建一个get请求**/ HttpGet get = new HttpGet("http://aaron-pc.wsd.com/Test/testHttp"); HttpResponse response1=null; String strResult1="";try {/**客服端向服务器发送请求**/response1 = client1.execute(get);} catch (ClientProtocolException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} /**请求发送成功，并得到响应**/ if(response1.getStatusLine().getStatusCode()==200){ try { /**读取服务器返回过来的json字符串数据**/ strResult1 = EntityUtils.toString(response1.getEntity()); } catch (IllegalStateException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} JSONObject jsonObject1 = null;try {/**把json字符串转换成json对象**/jsonObject1 = getJSON(strResult1);} catch (JSONException e1) {// TODO Auto-generated catch blocke1.printStackTrace();} String names=""; try { /** * jsonObject.getString("code") 取出code * 比如这里返回的json 字符串为 [code:0,msg:"ok",data:[list:{"name":1},{"name":2}]] * **/ /**得到data这个key**/ String data=jsonObject1.getString("data"); /**把data下的数据转换成json对象**/ JSONObject jDat1 = new JSONObject(data); /**判断data对象下的list是否存在**/ if(jDat1.get("list")!=null){ /**把list转换成jsonArray对象**/ JSONArray jarr1 = jDat1.getJSONArray("list"); /**循环list对象**/ for (int i = 0; i < jarr1.length(); i++) { /** **/ JSONObject jsono = (JSONObject) jarr1.get(i); /**取出list下的name的值 **/ names=names+jsono.getString("name"); } }Toast.makeText(TestHttpActivity.this, "get请求： code:"+jsonObject1.getString("code")+"name:"+names, Toast.LENGTH_SHORT).show();} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();} } else Toast.makeText(TestHttpActivity.this, "get提交失败", Toast.LENGTH_SHORT).show(); break;}}};public JSONObject getJSON(String sb) throws JSONException { return new JSONObject(sb); } }?